Question

Hitunglah fraksi mol urea co(nh2)2 dalam larutan urea 20%

Mohon Dijawab Yaa... :-);-)

Answer 1

Urea 20% = 20 gram urea
Air 80 % = 80 gram

mol urea = gr/Mr = 20/60 = 1/3
mol air = gr/Mr = 80/18 = 40/9
mol larutan = 1/3 + 40/9 = 43/9

fraksi mol urea